Mikrodalga ve UV radyasyonlarının Akdeniz un güvesi Ephestia kuehniella Zeller, 1879 (Lepidoptera: Pyralidae) üzerindeki ovisidal aktivitesi

Öz

Bu çalışmada mikrodalga ve ultraviyole (UV) radyasyonlarının Ephestia kuehniella Zeller, 1879 yumurtaları üzerindeki öldürücü etkisi araştırılmıştır. Yumurtalar (<24 h) farklı sürelerde mikrodalga ve UV radyasyonuna maruz bırakılmıştır. Mikrodalga radyasyonu 150, 360, 430 ve 600 W güçte, 10-300 s arasında değişen sürelerde uygulanmıştır. Güç ve zaman artışına bağlı olarak yumurta ölümü belirgin bir şekilde artmış ve buna bağlı olarak larva çıkışında da azalma gözlenmiştir. Yumurtalar 150 W güçteki mikrodalga kaynağına 300 s süreyle maruz bırakıldığında %100 oranında ölüm gözlenmiştir. Aynı ölüm oranı uygulanan en yüksek güce (600 W) sahip kaynak ile 10s’de elde edilmiştir. Yumurtalar 600 W’lık kaynağa maruz bırakıldığında LT50 ve LT99 değerleri sırasıyla 2.61 ve 7.34 s olarak bulunmuştur. Benzer şekilde kısa dalga (254 nm) ve uzun dalga (365 nm) UV radyasyonları da artan uygulama süresine bağlı olarak E. kuehniella yumurtalarından larva çıkışını azaltmıştır. UV radyasyonu 254 ve 365 nm’de en uzun sürede (300 s) uygulandığında yumurta ölümü sırasıyla % 92.20 ve 28.89 olarak belirlenmiştir. Kısa dalga UV uygulamasında LT50 ve LT99 değerleri sırasıyla 155.680 ve 418.068 s olarak hesaplanmıştır.

Anahtar Kelimeler

• Mikrodalga radyasyonu
• UV radyasyonu
• ölüm oranı
• letal zaman

Ovicidal activity of microwave and UV radiations on mediterranean flour moth Ephestia kuehniella Zeller, 1879 (Lepidoptera: Pyralidae)

Abstract

Insecticidal activity of microwave and ultraviolet radiation (UV) on E. kuehniella, 1879 (Lepidoptera: Pyralidae) eggs were investigated. Eggs (≤24 h) were exposed to microwave and UV radiation at different time periods. Microwave radiation was applied at the powers of 150, 360, 430, and 600 W for different exposure times (10-300 s). It was evident that increasing power and exposure times caused increasing mortality on the eggs and accordingly larval emergence decreased. Complete mortality was achieved at the power of 150 W and the longest exposure time (300 s). The same result was achieved at the highest dose (600 W) and the shortest exposure time (10s). When the eggs were treated with the highest power of microwave radiation used, the lethal times were estimated as, 2.61 (LT50) and 7.34 s (LT99). Similarly short (254 nm) and long-wave UV (365 nm) radiations also decreased the larval emergence from E. kuehniella eggs depending on increasing time periods. The highest period of UV treatment (300 s) caused 92.20% and 28.89% egg mortality at 254 and 365 nm, respectively. The lethal times, LT50 and LT99 for short wave UV radiation were estimated to be 155.68 and 418.068 s, respectively.

Keywords

• Microwave radiation
• UV radiation
• mortality
• lethal time

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